var util = require('../../../utils/util.js');
var api = require('../../../config/api.js');

var app = getApp();

Page({
    data: {
        couponList: [],
        cartId: 0,
        couponId: 0,
        userCouponId: 0,
        grouponLinkId: 0,
        scrollTop: 0
    },


    /**
     * 生命周期函数--监听页面加载
     */
    onLoad: function (options) {
    },

    /**
     * 生命周期函数--监听页面初次渲染完成
     */
    onReady: function () {

    },

    /**
     * 生命周期函数--监听页面显示
     */
    onShow: function () {
        // 页面显示
        wx.showLoading({
            title: '加载中...',
        });

        try {
            var cartId = wx.getStorageSync('cartId');
            if (!cartId) {
                cartId = 0;
            }

            var couponId = wx.getStorageSync('couponId');
            if (!couponId) {
                couponId = 0;
            }

            var userCouponId = wx.getStorageSync('userCouponId');
            if (!userCouponId) {
                userCouponId = 0;
            }

            var grouponRulesId = wx.getStorageSync('grouponRulesId');
            if (!grouponRulesId) {
                grouponRulesId = 0;
            }

            this.setData({
                cartId: cartId,
                couponId: couponId,
                userCouponId: userCouponId,
                grouponRulesId: grouponRulesId
            });

        } catch (e) {
            // Do something when catch error
            console.log(e);
        }

        this.getCouponList();
    },

    /**
     * 生命周期函数--监听页面隐藏
     */
    onHide: function () {

    },

    /**
     * 生命周期函数--监听页面卸载
     */
    onUnload: function () {

    },

    /**
     * 页面相关事件处理函数--监听用户下拉动作
     */
    onPullDownRefresh: function () {

    },

    /**
     * 页面上拉触底事件的处理函数
     */
    onReachBottom() {
    },

    /**
     * 用户点击右上角分享
     */
    onShareAppMessage: function () {

    },
    getCouponList: function () {

        let that = this;
        that.setData({
            couponList: []
        });
        // 页面渲染完成
        wx.showToast({
            title: '加载中...',
            icon: 'loading',
            duration: 2000
        });

        util.request(api.CouponSelectList, {
            cartId: that.data.cartId,
            grouponRulesId: that.data.grouponRulesId,
        }).then(function (res) {
            if (res.errno === 0) {
                let list = [];
                for (var i = 0; i < res.data.list.length; i++) {
                    if (res.data.list[i].available) {
                        list.push(res.data.list[i]);
                    }
                }
                that.setData({
                    couponList: list
                });
            }
            wx.hideToast();
        });

    },
    selectCoupon: function (e) {
        try {
            wx.setStorageSync('couponId', e.currentTarget.dataset.cid);
            wx.setStorageSync('userCouponId', e.currentTarget.dataset.id);
        } catch (error) {

        }

        wx.navigateBack();
    },
    unselectCoupon: function () {
        // 如果优惠券ID设置-1，则表示订单不使用优惠券
        try {
            wx.setStorageSync('couponId', -1);
            wx.setStorageSync('userCouponId', -1);
        } catch (error) {

        }

        wx.navigateBack();
    }

});